I worked at Taco Bell while in high school. One of my coworkers was this guy who was really friendly, but also really strange. He was obsessed with being a "straight edge" kid and drew the Xs on his hands, and the whole nine yards. He had a high pitched, but pleasant voice, and spoke in an overly polite manner.
Anyway, he had put in his two weeks and on his last day he was working the front counter register. This lady walks up to order and he just stares at her. After a few seconds she says "Umm... can you take my order?" In his very calm and polite voice he says "Oh, I am sorry ma'am, but I cannot." There was another awkward pause and she says "Ummm... well why not?" He responds with "....BECAUSE I AM A DINOSAUR!!!"
He immediately started growling and roaring at her, and he walked back and forth behind the counter like a T-Rex. He did this until the GM who was back making food realized what was going on. On her way up to the counter he calmly clocked out and left. The GM had to apologize over and over again to the poor woman trying to order.
That kid was a Taco Bell legend for several years.
Edit: I forgot to add that he was a 6'3" 250lb...ish burly guy who wore eye liner and had blue hair.